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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2015 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: AbstractBody.html 842 2015-03-07 18:20:42Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.jsimpledb.demo;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import com.vaadin.server.StreamResource;<a name="line.10"></a>
<span class="sourceLineNo">011</span>import com.vaadin.shared.ui.label.ContentMode;<a name="line.11"></a>
<span class="sourceLineNo">012</span>import com.vaadin.ui.Component;<a name="line.12"></a>
<span class="sourceLineNo">013</span>import com.vaadin.ui.Field;<a name="line.13"></a>
<span class="sourceLineNo">014</span>import com.vaadin.ui.Image;<a name="line.14"></a>
<span class="sourceLineNo">015</span><a name="line.15"></a>
<span class="sourceLineNo">016</span>import java.io.ByteArrayInputStream;<a name="line.16"></a>
<span class="sourceLineNo">017</span><a name="line.17"></a>
<span class="sourceLineNo">018</span>import org.dellroad.stuff.vaadin7.BlobField;<a name="line.18"></a>
<span class="sourceLineNo">019</span>import org.dellroad.stuff.vaadin7.FieldBuilder;<a name="line.19"></a>
<span class="sourceLineNo">020</span>import org.dellroad.stuff.vaadin7.ProvidesProperty;<a name="line.20"></a>
<span class="sourceLineNo">021</span>import org.jsimpledb.gui.NullableField;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import org.jsimpledb.gui.SizedLabel;<a name="line.22"></a>
<span class="sourceLineNo">023</span><a name="line.23"></a>
<span class="sourceLineNo">024</span>/**<a name="line.24"></a>
<span class="sourceLineNo">025</span> * Support superclass for {@code Body} implementations.<a name="line.25"></a>
<span class="sourceLineNo">026</span> */<a name="line.26"></a>
<span class="sourceLineNo">027</span>public abstract class AbstractBody implements Body {<a name="line.27"></a>
<span class="sourceLineNo">028</span><a name="line.28"></a>
<span class="sourceLineNo">029</span>// Object<a name="line.29"></a>
<span class="sourceLineNo">030</span><a name="line.30"></a>
<span class="sourceLineNo">031</span>    // Show the database object ID instead of system hash code<a name="line.31"></a>
<span class="sourceLineNo">032</span>    @Override<a name="line.32"></a>
<span class="sourceLineNo">033</span>    public String toString() {<a name="line.33"></a>
<span class="sourceLineNo">034</span>        return this.getClass().getName() + "@" + this.getObjId();<a name="line.34"></a>
<span class="sourceLineNo">035</span>    }<a name="line.35"></a>
<span class="sourceLineNo">036</span><a name="line.36"></a>
<span class="sourceLineNo">037</span>// Vaadin GUI customizations<a name="line.37"></a>
<span class="sourceLineNo">038</span><a name="line.38"></a>
<span class="sourceLineNo">039</span>    // The @ProvidesProperty annotation here indicates that this method should be invoked<a name="line.39"></a>
<span class="sourceLineNo">040</span>    // to build the Vaadin property named "image" instead of doing the default thing (using toString()).<a name="line.40"></a>
<span class="sourceLineNo">041</span>    // We are converting the byte[] value into a Vaadin PNG Image object.<a name="line.41"></a>
<span class="sourceLineNo">042</span><a name="line.42"></a>
<span class="sourceLineNo">043</span>    @ProvidesProperty("image")<a name="line.43"></a>
<span class="sourceLineNo">044</span>    @SuppressWarnings("serial")<a name="line.44"></a>
<span class="sourceLineNo">045</span>    private Component propertyImage() {<a name="line.45"></a>
<span class="sourceLineNo">046</span>        final byte[] imageData = this.getImage();<a name="line.46"></a>
<span class="sourceLineNo">047</span>        if (imageData == null)<a name="line.47"></a>
<span class="sourceLineNo">048</span>            return new SizedLabel("&lt;i&gt;Null&lt;/i&gt;", ContentMode.HTML);<a name="line.48"></a>
<span class="sourceLineNo">049</span>        return new Image(null, new StreamResource(new StreamResource.StreamSource() {<a name="line.49"></a>
<span class="sourceLineNo">050</span>            @Override<a name="line.50"></a>
<span class="sourceLineNo">051</span>            public ByteArrayInputStream getStream() {<a name="line.51"></a>
<span class="sourceLineNo">052</span>                return new ByteArrayInputStream(imageData);<a name="line.52"></a>
<span class="sourceLineNo">053</span>            }<a name="line.53"></a>
<span class="sourceLineNo">054</span>        }, "image.png"));<a name="line.54"></a>
<span class="sourceLineNo">055</span>    }<a name="line.55"></a>
<span class="sourceLineNo">056</span><a name="line.56"></a>
<span class="sourceLineNo">057</span>    // The @FieldBuilder.ProvidesField annotation indicates that if anyone wants to edit<a name="line.57"></a>
<span class="sourceLineNo">058</span>    // the "image" field, they should use this method to build an appropriate Vaaddin Field instead<a name="line.58"></a>
<span class="sourceLineNo">059</span>    // of doing the default thing (i.e., using a TextField).<a name="line.59"></a>
<span class="sourceLineNo">060</span><a name="line.60"></a>
<span class="sourceLineNo">061</span>    @FieldBuilder.ProvidesField("image")<a name="line.61"></a>
<span class="sourceLineNo">062</span>    private Field&lt;byte[]&gt; buildImagePropertyField() {<a name="line.62"></a>
<span class="sourceLineNo">063</span>        return new NullableField&lt;byte[]&gt;(new BlobField());<a name="line.63"></a>
<span class="sourceLineNo">064</span>    }<a name="line.64"></a>
<span class="sourceLineNo">065</span>}<a name="line.65"></a>
<span class="sourceLineNo">066</span><a name="line.66"></a>




























































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